This ranged from the familiar, such as diesels and flex-fuel vehicles (which can run on E85 ethanol) to more exotic designs, such as the second-generation Honda FCX Clarity fuel-cell vehicle and the plug-in, fuel-cell Volkswagen Space Up!

This ranged from the familiar, such as diesels and flex-fuel vehicles which can run on E85 ethanol to more exotic designs, such as the second-generation Honda FCX Clarity fuel-cell vehicle and the plug-in, fuel-cell Volkswagen Space Up!